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A platform for research: civil engineering, architecture and urbanism
Sodium lignin sulfonate water reducing agent and preparation method thereof
The invention provides a sodium lignin sulfonate water reducing agent which is prepared by the following steps: S1, drying chestnut shells, crushing, ball-milling and sieving to obtain chestnut shellpowder, and extracting to obtain degreased chestnut shell powder; S2, adding the degreased chestnut shell powder into 1-hexyl-3-methyl-imidazolium bisulfate to obtain a mixed solution, adding the mixed solution into a micro-jet extractor, and extracting to obtain lignin; S3, carrying out a reaction among lignin, sodium sulfite, formaldehyde and distilled water to obtain sodium lignin sulfonate; and S4, grafting sodium lignin sulfonate and tartaric acid to obtain the sodium lignin sulfonate water reducing agent. The invention also provides a preparation method of the sodium lignin sulfonate water reducing agent. The sodium lignin sulfonate water reducing agent provided by the invention has the advantages of higher sulfonation rate, higher water reducing rate, better dispersity and higher effect of improving the compressive strength of concrete.
本发明提供了一种木质素磺酸钠减水剂，其由以下步骤制成：S1.将板栗果壳干燥，粉碎后球磨、过筛得到板栗果壳粉末，提取得到脱脂板栗果壳粉末；S2.将脱脂板栗果壳粉末加入1‑己基‑3‑甲基‑咪唑鎓硫酸氢盐中得到混合液，加入微射流提取器中提取得到木质素；S3.将木质素、亚硫酸钠、甲醛、蒸馏水反应，得到木质素磺酸钠；S4.将木质素磺酸钠与酒石酸进行接枝得到木质素磺酸钠减水剂。本发明还提供了该木质素磺酸钠减水剂的制备方法。本发明所提供的木质素磺酸钠减水剂具有较高的磺化率、减水率，还具有较好的分散性和对混凝土抗压强度的提高效果。
Sodium lignin sulfonate water reducing agent and preparation method thereof
The invention provides a sodium lignin sulfonate water reducing agent which is prepared by the following steps: S1, drying chestnut shells, crushing, ball-milling and sieving to obtain chestnut shellpowder, and extracting to obtain degreased chestnut shell powder; S2, adding the degreased chestnut shell powder into 1-hexyl-3-methyl-imidazolium bisulfate to obtain a mixed solution, adding the mixed solution into a micro-jet extractor, and extracting to obtain lignin; S3, carrying out a reaction among lignin, sodium sulfite, formaldehyde and distilled water to obtain sodium lignin sulfonate; and S4, grafting sodium lignin sulfonate and tartaric acid to obtain the sodium lignin sulfonate water reducing agent. The invention also provides a preparation method of the sodium lignin sulfonate water reducing agent. The sodium lignin sulfonate water reducing agent provided by the invention has the advantages of higher sulfonation rate, higher water reducing rate, better dispersity and higher effect of improving the compressive strength of concrete.
本发明提供了一种木质素磺酸钠减水剂，其由以下步骤制成：S1.将板栗果壳干燥，粉碎后球磨、过筛得到板栗果壳粉末，提取得到脱脂板栗果壳粉末；S2.将脱脂板栗果壳粉末加入1‑己基‑3‑甲基‑咪唑鎓硫酸氢盐中得到混合液，加入微射流提取器中提取得到木质素；S3.将木质素、亚硫酸钠、甲醛、蒸馏水反应，得到木质素磺酸钠；S4.将木质素磺酸钠与酒石酸进行接枝得到木质素磺酸钠减水剂。本发明还提供了该木质素磺酸钠减水剂的制备方法。本发明所提供的木质素磺酸钠减水剂具有较高的磺化率、减水率，还具有较好的分散性和对混凝土抗压强度的提高效果。
Sodium lignin sulfonate water reducing agent and preparation method thereof
一种木质素磺酸钠减水剂及其制备方法
HUANG QIONG'AN (author) / ZHANG YUPING (author) / LU YANXIANG (author) / SONG JINGYI (author) / ZHANG TONGFENG (author) / KE ZEHUA (author) / QIU HUAFENG (author)
2020-05-12
Patent
Electronic Resource
Chinese
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